Patent US3106825A successfully refreshed from Google Patents.
US3106825A
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Mining apparatus and advancing means therefor
Assignee: Raheinstahl Wanheim G M B H
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Filing: 1960-06-07
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Granted: 1963-10-15
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Expires: 1980-06-07
Abstract
No abstract record available.
Inventors
- 👤 Barall Karl
- 👤 Wilkenloh Wilhelm
- 👤 Kuhnapfel Friedhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:34
CPC Classifications
E; E21; E21D; E21D23/00; E21D23/0056; E21D23/0052; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A MINING APPARATUS COMPRISING, IN COMBINATION, A FIRST AND A SECOND PROP UNIT, SAID UNITS ARRANGED SIDE BY SIDE AND EACH HAVING ROOF ENGAGING MEANS FOR RELEASABLY ENGAGING THE ROOF OF AN EXCAVATION SO AS TO HOLD THE RESPECTIVE UNIT AGAINST MOVEMENT WITH RESPECT TO THE ROOF; AND ADVANCING MEANS FOR STEPWISE MOVING SAID PROP UNITS WITH RESPECT TO EACH OTHER IN THE SAME DIRECTION, SAID ADVANCING MEANS COMPRISING A PAIR OF PARALLEL TOOTHED RACKS, ONE FOR EACH OF SAID UNITS AND EACH ADAPTED TO BE SECURED TO THE RESPECTIVE UNIT SO THAT DISPLACEMENTS OF SAID RACKS WILL CAUSE DISPLACEMENTS OF THE UNITS, COUPLING MEANS SLIDABLY CONNECTING SAID RACKS TO EACH OTHER SO THAT THE RACK OF THE UNIT WHICH IS DISENGAGED FROM ONE ROOF MAY MOVE WITH RESPECT TO THE RACK OF THE ROOFENGAGING UNIT, AND SHIFTING MEANS FOR MOVING THE RACKS WITH RESPECT TO EACH OTHER AND INCLUDING A FLOATING PINION MESHING WITH SAID RACKS AND DRIVE MEANS FOR ROTATING THE PINION IN CLOCKWISE AND ANTICLOCKWISE DIRECTIONS TO RESPECTIVELY MOVE ONE OF THE RACKS WITH RESPECT TO THE OTHER RACK AND VISE VERSA.
Claim 2
Dependent Claim
185 words
A MINING APPARATUS COMPRISING, IN COMBINATION, A FIRST AND A SECOND PROP UNIT, SAID UNITS ARRANGED SIDE BY SIDE AND EACH HAVING ROOF ENGAGING MEANS FOR RELEASABLY ENGAGING THE ROOF OF AN EXCAVATION SO AS TO HOLD THE RESPECTIVE UNIT AGAINST MOVEMENT WITH RESPECT TO THE ROOF; AND ADVANCING MEANS FOR STEPWISE MOVING SAID PROP UNITS WITH RESPECT TO EACH OTHER IN THE SAME DIRECTION, SAID ADVANCING MEANS COMPRISING A PAIR OF PARALLEL TOOTHED RACKS, ONE FOR EACH OF SAID UNITS AND EACH ADAPTED TO BE SECURED TO THE RESPECTIVE UNIT SO THAT DISPLACEMENTS OF SAID RACKS WILL CAUSE DISPLACEMENTS OF THE UNITS, COUPLING MEANS SLIDABLY CONNECTING SAID RACKS TO EACH OTHER SO THAT THE RACK OF THE UNIT WHICH IS DISENGAGED FROM ONE ROOF MAY MOVE WITH RESPECT TO THE RACK OF THE ROOFENGAGING UNIT, AND SHIFTING MEANS FOR MOVING THE RACKS WITH RESPECT TO EACH OTHER AND INCLUDING A FLOATING PINION MESHING WITH SAID RACKS AND DRIVE MEANS FOR ROTATING THE PINION IN CLOCKWISE AND ANTICLOCKWISE DIRECTIONS TO RESPECTIVELY MOVE ONE OF THE RACKS WITH RESPECT TO THE OTHER RACK AND VISE VERSA.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |